A rectangular concrete beam having a width of 300 mm is reinforced for tension only. The beam carries a factored moment of 540 kN-m. Concrete strength is f’c = 28 MPa and steel yield strength fy = 280 MPa. 13. Which of the following most nearly gives the balanced steel ratio?
A rectangular concrete beam having a width of 300 mm is reinforced for tension only. The beam carries a factored moment of 540 kN-m. Concrete strength is f’c = 28 MPa and steel yield strength fy = 280 MPa. 13. Which of the following most nearly gives the balanced steel ratio?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A rectangular concrete beam having a width of 300 mm is reinforced for tension only. The beam carries a factored moment of 540 kN-m. Concrete strength is f’c = 28 MPa and steel yield strength fy = 280 MPa.
13. Which of the following most nearly gives the balanced steel ratio?
A. 0.0493 B. 0.0439 C. 0.0394 D. 0.0349
14. Which of the following most nearly gives the minimum effective depth using a steel ratio equal to half the balanced steel ratio?
15. Which of the following most nearly gives the minimum effective depth using the maximum steel ratio permitted by the code?
A. 497.21 mm B. 518.67 mm C. 541.20 mm D. 568.18 mm
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